View clinical trials related to Hidradenitis Suppurativa.
Filter by:Hidradenitis Suppurativa (HS) is a chronic disabling inflammatory skin disorder associated with the development of painful and purulent lesions of the folds (armpits, inguinal folds, sub-mammary glands). HS most often develops in adolescence or young adulthood and is characterized by inflammation of the pilo-sebaceous system, of progressive severity (folliculitis, nodule, abscess, fistula). The pathogenesis of HS is still poorly understood: the fact that patients respond to combinations of antibiotics and/or immunosuppressive treatments suggests that the disease could be due to a dysregulated immune response against microbial skin flora. Unconventional lymphocytes (UL), classically considered being at the interface of innate and adaptive immunity, play an important role in immune protection against microbial flora. But UL dysfunction has also been reported in many autoimmune diseases involving various tissues (joints, digestive tract, skin). The uncontrolled and chronic activation of these UL by skin microbiota could therefore play a role in the pathogenesis of HS.
The pathogenesis of HS is still poorly understood: the pilosebaceous tropism and the fact that patients respond to combinations of antibiotics and/or immunosuppressive treatments suggest the involvement of 3 factors that would be intimately linked: the presence of (i) a microbial dysbiosis, (ii) a dysfunction of the pilosebaceous apparatus and (iii) an inappropriate immune response. But how these 3 elements interact with each other remains unestablished, with few studies that have analyzed them from a kinetic point of view. Beyond a possible dysfunction of the pilosebaceous apparatus, we hypothesize a bacterial dysbiosis in connection with abnormalities of autophagy function with secondary development of an inappropriate immune response. Because of its functions of bacterial clearance and activation of local immune response, a defect in the autophagic process may be associated with the development of inflammatory pathologies related to microbial dysbiosis. Crohn's disease (CD), an inflammatory pathology of the gastrointestinal tract associated with intestinal dysbiosis, has been associated with alterations in autophagy, with approximately 50% of patients having single nucleotide polymorphisms (SNPs) associated with autophagy deficiency (Ellinghaus et al., 2013). The epidemiological association of CD/HS, the presence of skin dysbiosis and a chronic inflammatory response during HS, make us suspect a deficit of autophagic function in these patients, in a similar way to what is observed during Crohn's disease. The aim of this study is to analyze the frequency of 100 SNPs, reported to be associated with autophagy deficiency, in a cohort of moderate-to-severe HS patients.
Assess the efficacy of fractional ablative CO2 therapy combined with topical steroids in HS patients with Hurley stage I or stage II disease. Hidradenitis suppurativa (HS) is a chronic, oftentimes debilitating inflammatory skin condition that presents with painful lesions in intertriginous areas of the body. The reported prevalence of HS in the U.S. is around 1-4%. Medical therapies, which typically consist of topical or systemic antibiotics, hormone- regulating drugs, and immunomodulators, are initially used to control the disease but HS can be recalcitrant to these modalities in the long-term. Optimizing management of mild-moderate HS is crucial to prevent disease progression and improve patients' quality of life.
Hidradenitis Suppurativa is a recurrent chronic inflammatory follicular occlusive disease affecting hair follicles. HS is notoriously difficult and challenging to treat with a high morbidity impact and could be classified as an unmet medical need with no efficient therapeutic options. Objective: Investigators previously showed that Outer Root Sheath Cells (ORS) isolated from hair follicle of HS patients (HS-ORS) have a pro-inflammatory phenotype and secrete spontaneously IP-10 and RANTES. To identify the mechanisms involved in the pro-inflammatory phenotype of HS-ORS, investigators performed a transcriptomic analysis in healthy and HS patients. This revealed: (i) an IFN signature, (i) a dysregulation of genes involved in cell proliferation and differentiation, and (iii) an upregulation of DNA damage response and cell cycle G2/M checkpoint pathways in HS-ORS. These findings support the notion that, in HS patients, a perturbation of HF-SC homeostasis leading to an increased proliferation induces a replicative stress and an accumulation of cytoplasmic ssDNA, stimulating IFN synthesis through IFI16-STING pathway. Interestingly, replicative stress in ORS were present in some but not all patients with Hidradenitis Suppurativa. The goal of study is to determine replicative stress in ORS in a large cohort of HS patients. Method Patients will be enrolled in the Mondor Dermatology department, during routine care. A dermatologist will check all inclusion and exclusion criteria with the technical support of a research technician of the Henri Mondor Clinical Investigation Center. Medical history, clinical data, comorbidities and concomitant therapies will be prospectively recorded in a dedicated case report form. Skin biopsies will be performed in perilesional zone rich in hair follicles. mRNA will be extracted from freshly isolated hair follicle cells and some slides will be prepared and stored at -80°C to perform immunohistochemistry analysis on freshly isolated hair follicle cells. PBMC and serum will be collected. All these biological samples will allow us to quantify the replicative stress in HS-ORS of each patient, and to quantify several cytokine of interest : IFN de type 1, IL-17, IL-6, TNF-α, IL-10 This study will allow investigators to evaluate the rate of patients with replicative stress in hair follicle stem cells in Hidradenitis Suppurativa. The investigator will also determine whether HF-SC replication stress correlates with clinical characteristics and/or with clinical course and/or comorbidities.
The purpose of the study is to determine whether a series of laser hair removal treatments can improve participant outcomes after deroofing procedures. A deroofing procedure is a surgery where larger hidradenitis suppurativa bumps (called nodules) and hidradenitis suppurativa tunnels (called sinus tracts) are removed and left to heal open without stitches.
Single center, open-label, baseline-controlled study evaluating the use of a Sciton fractionated ablative laser in the treatment of Hidradenitis Suppurativa (HS) scarring.
Hidradenitis suppurativa (HS), also known as Verneuil's disease, is a chronic inflammatory dermatosis of the hair follicule located mainly in the skin folds (axillae, inguinal, submammary, etc.). Currently, treatments are mainly limited to the use of broad-spectrum antibiotics in order to control outbreaks of hidradenitis suppurativa. Surgical treatment is the only curative treatment, but requires disfiguring removals with major scarring consequences. Pathophysiologically, HS appears to be a primary abnormality of the pilosebaceous-apocrine unit, causing follicular occlusion, followed by the development of perifollicular cysts with commensal bacterial overgrowth, and finally rupture into the dermis causing an exaggerated inflammatory response. At present, few studies have examined the role of the regulatory immune system and its involvement in this disease. We are also interested in analyzing the impact of new therapeutic strategies on hidradenitis suppurativa, and more particularly the impact of photodynamic therapy (PDT) which is a technique that has been used for a long time in dermatology, notably for the treatment of precancerous and cancerous lesions. This technique has shown interesting results on inflammatory dermatoses such as acne. This research consists in studying the immunomodulation of the immune response in HS and in evaluating a new therapeutic strategy based on PDT alone or in combination with antimicrobial peptides (PAMs).
The purpose of this study is to assess the efficacy and safety of oral administration of orismilast for treatment of mild, moderate, or severe hidradenitis suppurativa (HS) in adults.
The investigators hypothese that Janus kinase/signal transduction and activator of transcription (JAK/STAT) signaling pathway play a key role in pathophysiology of pyoderma gangrenosum (PG). In this study JAK/STAT signaling pathway will be investigated in the skin biopsies of PG patients
This is a survey study being conducted to describe how subjects with Hidradenitis suppurativa (HS) respond to treatment with gentian violet. The study will rely primarily on qualitative survey responses and quantitative changes in skin appearance.